EP0511432A2 - Modular display device formed by liquid crystal cells - Google Patents

Modular display device formed by liquid crystal cells Download PDF

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Publication number
EP0511432A2
EP0511432A2 EP91119993A EP91119993A EP0511432A2 EP 0511432 A2 EP0511432 A2 EP 0511432A2 EP 91119993 A EP91119993 A EP 91119993A EP 91119993 A EP91119993 A EP 91119993A EP 0511432 A2 EP0511432 A2 EP 0511432A2
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EP
European Patent Office
Prior art keywords
liquid crystal
display device
glass substrates
electrodes
conductor foil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91119993A
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German (de)
French (fr)
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EP0511432A3 (en
Inventor
Bernd Dr. Brauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ADC GmbH
Original Assignee
Krone GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Krone GmbH filed Critical Krone GmbH
Publication of EP0511432A2 publication Critical patent/EP0511432A2/en
Publication of EP0511432A3 publication Critical patent/EP0511432A3/en
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals

Definitions

  • the invention relates to a display device according to the preamble of claim 1.
  • the contact area between the electrodes and the conductor foil extends perpendicular to the plane of the glass substrates, the contact area in the display plane has minimal dimensions, so that it is hardly noticeable to the viewer.
  • the liquid crystal cells each consist in a known manner of a liquid crystal 1, two glass substrates 2 and 3 enclosing them, translucent electrodes 4 and 5 made of tin indium oxide (ITO) each on the surface of the glass substrates 2 and 3 facing the liquid crystal 1, an analyzer 6, a polarizer 7 and a sealing frame 8 that seals the space between the glass substrates 2 and 3 at the edge.
  • ITO tin indium oxide
  • the glass substrates 2 and 3 and the sealing frame 8 form a tight chamber for receiving the liquid crystal 1.
  • the electrodes 4 and 5 are guided to the outside for connection to the control electronics between the glass substrates 4 and 5 and the sealing frame 8.
  • the electrical connection between the electrodes 4 and 5 and the control electronics takes place via a flexible conductor foil, the individual conductor tracks of which are contacted with the electrodes of the liquid crystal cells.
  • the conductor film 9 extends in the area of the liquid crystal cells perpendicular to the plane of the glass substrates 2 and 3 or to the display plane and the contact area between the electrodes 4 and 5 and the conductor film 9 also extends in this direction.
  • the contact between the electrodes 4 and 5 and the conductor foil 9 can be produced in various ways.
  • a contact adhesive 10 is shown, which is applied to the side of the sealing frame 8 facing away from the liquid crystal 1 and thus connects the electrodes 4 and 5 to the conductor foil 9.
  • the glass substrates 2 and 3 can also be vapor-deposited on the edge surfaces perpendicular to their plane with a layer of metal or tin-indium oxide which is connected to the electrodes 4 and 5 and then this layer is soldered to the conductor tracks of the conductor foil 9 or glued.
  • Another possibility is to connect the electrodes 4 and 5 to the conductor foil 9 by means of a polymer which has been made conductive by laser radiation.
  • the edge surfaces of the glass substrates 2 and 3 can also be printed with a conductive resin.
  • the conductor foil 9 is firmly glued to the holding frame 11 so that it is not subjected to tensile forces.
  • an integrated circuit 13 for the control which is contacted with the conductor foil 9 using TAB technology (tape automatic bonding).
  • the holding frame 11 is designed in such a way that it does not take up more space in the direction of the display plane than the sealing frame 8.
  • a bus connection 14 which is in contact with the conductor foil 9.

Abstract

A description is given of a modular display device formed by liquid crystal cells. The liquid crystal cells in each case have a liquid crystal layer (1), which is enclosed between two parallel glass substrates (2, 3) and a sealing frame (8) connecting their rims, as well as transparent electrodes (4, 5) on the faces of the glass substrates facing the liquid crystal layer. In order to connect them to external control electronics, the electrodes are guided through the sealing frame and contacted outside thereof to a flexible conductive foil (9). In this arrangement, the contact region between the electrodes and the conductive foil extends perpendicular to the plane of the glass substrate, so that the contact surface has minimum dimensions in the display plane.

Description

Die Erfindung betrifft eine Anzeigevorrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to a display device according to the preamble of claim 1.

Größflächige Flüssigkristallanzeigen erfordern üblicherweise ein modulares System, da die technologisch realisierbaren Flächen einer Flüssigkristallmatrix begrenzt sind. Bei einer Modulbauweise jedoch stören die in der Anzeigeebene zwischen den Anzeigeelementen liegenden Kontaktierungsflächen den Betrachter erheblich.Large-area liquid crystal displays usually require a modular system, since the technologically feasible areas of a liquid crystal matrix are limited. In the case of a modular construction, however, the contacting areas lying in the display plane between the display elements considerably disturb the viewer.

Aus der DE 38 40 836 A1 ist eine Flüssigkristallanzeige-Anordnung mit einem Anzeigeelement mit mehreren Flüssigkristallzellen bekannt, bei der sich elektrische Anschlußstellen für die Flüssigkristallzellen zur Kante des Anzeigeelementes hin erstrecken. Mit den in der Ebene des Anzeigeelements liegenden Anschlußstellen sind leitende Bahnen eines mehrschichtigen flexiblen Verbindungsteils kontaktiert. Dieses wird um die Kante des Anzeigeelements herum aus dessen Ebene herausgebogen, so daß die in dieser Ebene durch die Kontaktierung eingenommene Fläche relativ klein gehalten ist. Jedoch wird sie immer noch als deutlich störend empfunden.From DE 38 40 836 A1 a liquid crystal display arrangement with a display element with several liquid crystal cells is known, in which electrical connection points for the liquid crystal cells extend to the edge of the display element. Conductive tracks of a multilayer flexible connecting part are contacted with the connection points lying in the plane of the display element. This is bent around the edge of the display element out of its plane, so that the area occupied by the contact in this plane is kept relatively small. However, it is still perceived as clearly annoying.

Es ist daher die Aufgabe der vorliegenden Erfindung, eine aus Flüssigkristallzellen gebildete modulare Anzeigevorrichtung, bei der die Flüssigkristallzellen jeweils eine zwischen zwei parallelen Glassubstraten und einem deren Ränder verbindenden Dichtrahmen eingeschlossene Flüssigkristallschicht aufweisen und transparente Elektroden auf den der Flüssigkristallschicht zugewandten Flächen der Glassubstrate vorgesehen sind, die zur Verbindung mit einer externen Ansteuerelektronik durch den Dichtrahmen geführt und außerhalb von diesem mit einer flexiblen Leiterfolie kontaktiert sind, zu schaffen, bei der die in der Anzeigeebene liegenden Flächen für die Kontaktierung noch kleiner gehalten sind.It is therefore the object of the present invention to provide a modular display device formed from liquid crystal cells, in which the liquid crystal cells each have a liquid crystal layer enclosed between two parallel glass substrates and a sealing frame connecting their edges and transparent electrodes are provided on the surfaces of the glass substrates facing the liquid crystal layer for connection to external control electronics through the sealing frame and contacted outside of it with a flexible conductor foil, in which the areas lying in the display plane are kept even smaller for contacting.

Diese Aufgabe wird erfindungsgemäß gelöst durch das im kennzeichnenden Teil des Anspruchs 1 angegebene Merkmal. Vorteilhafte Weiterbildungen der erfindungsgemäßen Anzeigevorrichtung ergeben sich aus den Unteransprüchen.This object is achieved by the feature specified in the characterizing part of claim 1. Advantageous developments of the display device according to the invention result from the subclaims.

Dadurch, daß sich der Kontaktbereich zwischen den Elektroden und der Leiterfolie senkrecht zur Ebene der Glassubstrate erstreckt, besitzt die Kontaktfläche in der Anzeigeebene minimale Abmessungen, so daß sie dem Betrachter kaum noch auffällt.Because the contact area between the electrodes and the conductor foil extends perpendicular to the plane of the glass substrates, the contact area in the display plane has minimal dimensions, so that it is hardly noticeable to the viewer.

Die Erfindung wird im folgenden anhand eines in der Figur dargestellten Ausführungsbeispiels näher erläutert. Diese zeigt einen senkrechten Schnitt durch den Randbereich zweier benachbarter Flüssigkristallzellen mit einem elektrischen Anschluß für eine dieser Zellen.The invention is explained below with reference to an embodiment shown in the figure. This shows a vertical section through the edge region of two adjacent liquid crystal cells with an electrical connection for one of these cells.

Die Flüssigkristallzellen bestehen in bekannter Weise jeweils aus einem Flüssigkristall 1, zwei diesen einschließenden Glassubstraten 2 und 3, lichtdurchlässigen Elektroden 4 und 5 aus Zinn-Indium-Oxid (ITO) jeweils auf der dem Flüssigkristall 1 zugewandten Fläche der Glassubstrate 2 und 3, einem Analysator 6, einem Polarisator 7 und einem den Zwischenraum zwischen den Glassubstraten 2 und 3 am Rand abschließenden Dichtrahmen 8.The liquid crystal cells each consist in a known manner of a liquid crystal 1, two glass substrates 2 and 3 enclosing them, translucent electrodes 4 and 5 made of tin indium oxide (ITO) each on the surface of the glass substrates 2 and 3 facing the liquid crystal 1, an analyzer 6, a polarizer 7 and a sealing frame 8 that seals the space between the glass substrates 2 and 3 at the edge.

Die Glassubstrate 2 und 3 und der Dichtrahmen 8 bilden eine dichte Kammer für die Aufnahme des Flüssigkristalls 1. Die Elektroden 4 und 5 sind zum Anschluß an die Ansteuerelektronik zwischen den Glassubstraten 4 und 5 und dem Dichtrahmen 8 nach außen geführt.The glass substrates 2 and 3 and the sealing frame 8 form a tight chamber for receiving the liquid crystal 1. The electrodes 4 and 5 are guided to the outside for connection to the control electronics between the glass substrates 4 and 5 and the sealing frame 8.

Die elektrische Verbindung zwischen den Elektroden 4 und 5 und der Ansteuerelektronik erfolgt über eine flexible Leiterfolie, deren einzelne Leiterbahnen mit den Elektroden der Flüssigkristallzellen kontaktiert sind. Die Leiterfolie 9 erstreckt sich im Bereich der Flüssigkristallzellen senkrecht zur Ebene der Glassubstrate 2 und 3 bzw. zur Anzeigeebene und der Kontaktbereich zwischen den Elektroden 4 und 5 und der Leiterfolie 9 erstreckt sich ebenfalls in dieser Richtung.The electrical connection between the electrodes 4 and 5 and the control electronics takes place via a flexible conductor foil, the individual conductor tracks of which are contacted with the electrodes of the liquid crystal cells. The conductor film 9 extends in the area of the liquid crystal cells perpendicular to the plane of the glass substrates 2 and 3 or to the display plane and the contact area between the electrodes 4 and 5 and the conductor film 9 also extends in this direction.

Der Kontakt zwischen den Elektroden 4 und 5 und der Leiterfolie 9 kann auf verschiedene Weise hergestellt werden. In der Figur ist ein Kontaktkleber 10 gezeigt, der auf die dem Flüssigkristall 1 abgewandte Seite des Dichtrahmens 8 aufgebracht ist und damit die Elektroden 4 und 5 mit der Leiterfolie 9 verbindet. Beispielsweise können die Glassubstrate 2 und 3 auch auf den zu ihrer Ebene senkrechten Randflächen mit einer mit den Elektroden 4 und 5 in Verbindung stehenden Schicht aus Metall oder Zinn-Indium-Oxid bedampft werden und anschließend wird diese Schicht mit den Leiterbahnen der Leiterfolie 9 verlötet oder verklebt.The contact between the electrodes 4 and 5 and the conductor foil 9 can be produced in various ways. In the figure, a contact adhesive 10 is shown, which is applied to the side of the sealing frame 8 facing away from the liquid crystal 1 and thus connects the electrodes 4 and 5 to the conductor foil 9. For example, the glass substrates 2 and 3 can also be vapor-deposited on the edge surfaces perpendicular to their plane with a layer of metal or tin-indium oxide which is connected to the electrodes 4 and 5 and then this layer is soldered to the conductor tracks of the conductor foil 9 or glued.

Eine weitere Möglichkeit besteht in der Verbindung der Elektroden 4 und 5 mit der Leiterfolie 9 durch ein Polymer, das durch Laserbestrahlung leitfähig gemacht wurde. Schließlich können anstelle der Metallbedampfung die Randflächen der Glassubstrate 2 und 3 auch mit einem leitfähigen Harz bedruckt werden.Another possibility is to connect the electrodes 4 and 5 to the conductor foil 9 by means of a polymer which has been made conductive by laser radiation. Finally, instead of metal vapor deposition, the edge surfaces of the glass substrates 2 and 3 can also be printed with a conductive resin.

Zur mechanischen Stabilisierung und Führung der Leiterfolie 9 dient ein kastenförmiger Halterahmen 11, der durch ein Klebmittel 12 an der Rückseite der Flüssigkristallzellen befestigt ist. Die Leiterfolie 9 ist mit dem Halterahmen 11 fest verklebt, so daß sie keinen Zugkräften unterworfen ist. In einer Aussparung des Halterahmens 11 befindet sich ein integrierter Schaltkreis 13 für die Ansteuerung, der in TAB-Technik (Tape Automatic Bonding) mit der Leiterfolie 9 kontaktiert ist. Der Halterahmen 11 ist so konzipiert, daß er in Richtung der Anzeigeebene nicht mehr Platz beansprucht als der Dichtrahmen 8. Am unteren Ende des Halterahmens 11 befindet sich ein mit der Leiterfolie 9 in Kontakt stehender Busanschluß 14.A box-shaped holding frame 11, which is attached to the back of the liquid crystal cells by an adhesive 12, is used for mechanical stabilization and guiding of the conductor foil 9. The conductor foil 9 is firmly glued to the holding frame 11 so that it is not subjected to tensile forces. In a recess of the holding frame 11 there is an integrated circuit 13 for the control, which is contacted with the conductor foil 9 using TAB technology (tape automatic bonding). The holding frame 11 is designed in such a way that it does not take up more space in the direction of the display plane than the sealing frame 8. At the lower end of the holding frame 11 there is a bus connection 14 which is in contact with the conductor foil 9.

Claims (7)

1. Aus Flüssigkristallzellen gebildete modulare Anzeigevorrichtung, bei der die Flüssigkristallzellen jeweils eine zwischen zwei parallelen Glassubstraten und einem deren Ränder verbindenden Dichtrahmen eingeschlossene Flüssigkristallschicht aufweisen und transparente Elektroden auf den der Flüssigkristallschicht zugewandten Flächen der Glassubstrate vorgesehen sind, die zur Verbindung mit einer externen Ansteuerelektronik durch den Dichtrahmen geführt und außerhalb von diesem mit einer flexiblen Leiterfolie kontaktiert sind,
dadurch gekennzeichnet,
daß sich der Kontaktbereich zwischen den Elektroden (4,5) und der Leiterfolie (9) senkrecht zur Ebene der Glassubstrate (2,3) erstreckt.1. Modular display device formed from liquid crystal cells, in which the liquid crystal cells each have a liquid crystal layer enclosed between two parallel glass substrates and a sealing frame connecting their edges and transparent electrodes are provided on the surfaces of the glass substrates facing the liquid crystal layer, which are used for connection to external control electronics by the Sealing frame guided and contacted outside of this with a flexible conductor film,
characterized,
that the contact area between the electrodes (4, 5) and the conductor foil (9) extends perpendicular to the plane of the glass substrates (2, 3). 2. Anzeigevorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Glassubstrate (2,3) auf den zu ihrer Ebene senkrechten Randflächen eine mit den Elektroden (4,5) verbundene, elektrisch leitende Beschichtung aufweisen, die mit der Leiterfolie (9) fest verbunden ist.2. Display device according to claim 1, characterized in that the glass substrates (2, 3) have an electrically conductive coating connected to the electrodes (4, 5) on the edge surfaces perpendicular to their plane, which are firmly connected to the conductor foil (9) is. 3. Anzeigevorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Randflächen der Glassubstrate (2,3) mit einer Schicht aus Metall oder dem Material der Elektroden (4,5) bedampft sind, die mit der Leiterfolie (9) verlötet oder verklebt ist.3. Display device according to claim 2, characterized in that the edge surfaces of the glass substrates (2, 3) are vapor-coated with a layer of metal or the material of the electrodes (4, 5), which is soldered or glued to the conductor foil (9). 4. Anzeigevorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Randflächen der Glassubstrate (2,3) mit einem leitfähigen Harz bedruckt sind.4. Display device according to claim 2, characterized in that the edge surfaces of the glass substrates (2,3) are printed with a conductive resin. 5. Anzeigevorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß auf der der Flüssigkristallschicht (1) abgewandten Seite des Dichtrahmens (8) eine Kontaktkleberschicht (10) aufgebracht ist, die mit der Leiterfolie (9) in elektrischem Kontakt steht.5. Display device according to claim 1, characterized in that on the liquid crystal layer (1) facing away from the sealing frame (8) a contact adhesive layer (10) is applied, which is in electrical contact with the conductor foil (9). 6. Anzeigevorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Randflächen der Glassubstrate (2,3) und/oder die der Flüssigkristallschicht (1) abgewandten Flächen des Dichtrahmens (8) mit einem durch Laserbestrahlung in den leitfähigen Zustand gebrachten Polymer beschichtet sind, das mit der Leiterfolie (9) in elektrischem Kontakt steht.6. Display device according to claim 1, characterized in that the edge surfaces of the glass substrates (2, 3) and / or the surfaces of the sealing frame (8) facing away from the liquid crystal layer (1) are coated with a polymer brought into the conductive state by laser irradiation, the is in electrical contact with the conductor foil (9). 7. Anzeigevorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß anschließend an die Flüssigkristallzelle ein kastenförmiger Halterahmen (11) zur Führung und Zugentlastung der Leiterfolie (9) vorgesehen ist.7. Display device according to one of claims 1 to 6, characterized in that a box-shaped holding frame (11) for guiding and strain relief of the conductor foil (9) is provided next to the liquid crystal cell.
EP19910119993 1991-04-27 1991-11-23 Modular display device formed by liquid crystal cells Withdrawn EP0511432A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914113901 DE4113901A1 (en) 1991-04-27 1991-04-27 MODULAR DISPLAY DEVICE MADE FROM LIQUID CRYSTAL CELLS
DE4113901 1991-04-27

Publications (2)

Publication Number Publication Date
EP0511432A2 true EP0511432A2 (en) 1992-11-04
EP0511432A3 EP0511432A3 (en) 1993-08-04

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EP19910119993 Withdrawn EP0511432A3 (en) 1991-04-27 1991-11-23 Modular display device formed by liquid crystal cells

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EP (1) EP0511432A3 (en)
DE (1) DE4113901A1 (en)
IE (1) IE914557A1 (en)
PT (1) PT100428A (en)

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
DE4310112A1 (en) * 1993-03-27 1994-09-29 Licentia Gmbh Liquid-crystal display device

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GB2013385A (en) * 1978-01-30 1979-08-08 Timex Corp Crossover connections for multiplexed electro-optic displays
GB2058427A (en) * 1979-09-06 1981-04-08 Bbc Brown Boveri & Cie Modular Large-area Display Panel
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JPS612133A (en) * 1984-06-13 1986-01-08 Sharp Corp Liquid crystal display element
JPS6252534A (en) * 1985-08-30 1987-03-07 Matsushita Electric Ind Co Ltd Electrically connecting method
JPS62262831A (en) * 1986-05-09 1987-11-14 Nifco Inc Liquid crystal display module and its manufacture

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GB2013385A (en) * 1978-01-30 1979-08-08 Timex Corp Crossover connections for multiplexed electro-optic displays
GB2058427A (en) * 1979-09-06 1981-04-08 Bbc Brown Boveri & Cie Modular Large-area Display Panel
DE3410983A1 (en) * 1984-03-16 1985-09-26 Siemens AG, 1000 Berlin und 8000 München Mounting element for the attachment of an LCD display on a printed-circuit board
JPS612133A (en) * 1984-06-13 1986-01-08 Sharp Corp Liquid crystal display element
JPS6252534A (en) * 1985-08-30 1987-03-07 Matsushita Electric Ind Co Ltd Electrically connecting method
JPS62262831A (en) * 1986-05-09 1987-11-14 Nifco Inc Liquid crystal display module and its manufacture

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Also Published As

Publication number Publication date
PT100428A (en) 1994-04-29
DE4113901A1 (en) 1992-10-29
EP0511432A3 (en) 1993-08-04
IE914557A1 (en) 1992-11-04

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